Abstract #0089

Spiral Real-time Phase Contrast MR on a 0.55T MRI System

Ning Jin¹, Chong Chen², Juliet Varghese², Katherine Binzel^3,4, Yingmin Liu³, Rizwan Ahmad², and Orlando P. Simonetti^2,3,4,5,6

¹Siemens Medical Solutions USA, Inc, Solon, OH, United States, ²Department of Biomedical Engineering, The Ohio State University, Columbus, OH, United States, ³Dorothy M. Davis Heart and Lung Research Institute, The Ohio State University, Columbus, OH, United States, ⁴Department of Radiology, The Ohio State University, Columbus, OH, United States, ⁵Division of Cardiovascular Medicine, The Ohio State University, Columbus, OH, United States, ⁶Department of Internal Medicine, Columbus, OH, United States

Synopsis

Keywords: Flow, Low-Field MRI

Motivation: Free-breathing (FB) real-time phase contrast (RT-PC) MR is very useful to resolve the beat-by-beat variations and for patients for whom breath-holding poses a challenge; however its feasibility remains to be tested at low-field.

Goal(s): To develop a FB RT-PC MR technique on a clinical wide-bore 0.55T MR scanner with reduced gradient performance.

Approach: FB RT-PC was developed using a dual-density spiral readout with a modified golden-angle rotation strategy and compressed sensing reconstruction. Flow quantifications were compared with the conventional BH segmented PC approach.

Results: Our proposed method yielded flow measurements of comparable accuracy and effectively captured the peak flow dynamics at low-field.

Impact: The proposed RT PC MR technique for low-field systems could enable flow imaging for patients with arrhythmias, critical illnesses, or claustrophobia, potentially making cardiac MRI more accessible and patient-friendly in a variety of clinical settings.

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